Hello and welcome to HCM,
The presence of multiple active osseus lesions in ribs indicates multiple bony metastasis from tumor/ cancer.
There are a number cancers which metastasize to bones.
In case of males prostatic cancer is the commonest and in females breast cancer
is the commonest.
Hoever, a number of other cancers like cancer of the lung, intestine, etc can also metastaize to the bones.
Further complete examination of the body organ systems is required to find out the primary site of cancer.
The sites where the tumor has metastatized becomes weak and an under go pathological fractures
So, consult your doctor at the earliest.
Thanks and take care.
Dr Shailja P Wahal